纺织学报 ›› 2016, Vol. 37 ›› Issue (4): 38-42.

• 纺织工程 • 上一篇    下一篇

采用多项式拟合的细纱机双区牵伸与三区牵伸纤维分布对比

  

  • 收稿日期:2015-01-30 修回日期:2015-11-12 出版日期:2016-04-15 发布日期:2016-04-07

Fiber distribution comparison of two draft zones ring spinning machine and three draft zones ring spinning machine based on polynomial fitting

  • Received:2015-01-30 Revised:2015-11-12 Online:2016-04-15 Published:2016-04-07

摘要:

为探究牵伸倍数的提高及牵伸区个数的改变对成纱条干的影响,本文以9.7tex和7.3tex棉纱为例,分别采用QFA1528三罗拉双区牵伸细纱机和TH558四罗拉三区牵伸细纱机进行纺纱试验,采用切断称重法和MATLAB多项式拟合的方法对前牵伸区内纤维数量进行拟合计算,得到快速纤维和慢速纤维的分布曲线,对比分析两种牵伸方式前牵伸区内摩擦力界分布及纤维理论变速点的位置,从而探究牵伸方式对成纱质量的影响。结果表明,对于9.7tex棉纱,三区牵伸使前区纤维理论变速点比QFA1528双区牵伸细纱机后移,条干质量较差;对于7.3tex棉纱,三区牵伸可使进入前牵伸区的须条结构得到优化,纱线综合质量提高。

关键词: 双区牵伸, 三区牵伸, 纤维分布, 切断称重法, 多项式拟合

Abstract:

In order to study the effect of draft ratio and number of draft zones on yarn evenness, this paper researched two draft zones ring spinning machine and three draft zones ring spinning machine. 9.7tex and 7.3tex cotton yarn are taken as examples, yarns are spun on the QFA1528 ring spinning machine and TH558 ring spinning machine respectively. QFA1528 ring spinning machine has two draft zones while TH558 ring spinning machine has three draft zones. Both cut-middles method and polynomial fitting method are used to analyze the faster fibers distribution and slower fibers distribution. Then, the friction field distribution and theoretical position of floating fibers accelerated points of the front drafting zone in two spinning system are compared, and the effect on yarn quality can be concluded. The results indicate that for 9.7tex cotton yarn, theoretical position of floating fibers accelerated points in three drafting zones system is more near than that in two drafting zones system and the yarn evenness is worse. For 7.3tex cotton yarn, three draft zones can improve the sliver structure in front draft zone, and yarn quality can be improved.

Key words: two-zone draft, three-zone draft, fibers distribution, cut-middles method, polynomial fitting method

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